APA (7th ed.) Citation

American Horticultural Society, Brickell, C., McDonald, E., & Cole, T. J. (1993). The American Horticultural Society encyclopedia of gardening (First American edition.). Dorling Kindersley.

Chicago Style (17th ed.) Citation

American Horticultural Society, Christopher Brickell, Elvin McDonald, and Trevor J. Cole. The American Horticultural Society Encyclopedia of Gardening. First American edition. London ; New York: Dorling Kindersley, 1993.

MLA (9th ed.) Citation

American Horticultural Society, et al. The American Horticultural Society Encyclopedia of Gardening. First American edition. Dorling Kindersley, 1993.